VMware NAT Networking Buffer Overflow Vulnerability - Secunia Advisories - Vulnerability Intelligence

VMware NAT Networking Buffer Overflow Vulnerability
Secunia Advisory:	SA18162	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2005-12-21
Last Update:	2005-12-27
Popularity:	20,917 views

Critical:	Moderately critical
Impact:	System access
Where:	From local network
Solution Status:	Vendor Patch

Software:	VMware ACE 1.x VMware GSX Server 1.x VMware GSX Server 2.x VMware GSX Server 3.x VMware Player 1.x VMware Workstation 2.x VMware Workstation 3.x VMware Workstation 4.x VMware Workstation 5.x

Subscribe:	Instant alerts on relevant vulnerabilities

CVE reference:	CVE-2005-4459

Description: Tim Shelton has reported a vulnerability in VMware, which potentially can be exploited by malicious people to compromise a user's system. The vulnerability is caused due to an error in "vmnat.exe" (Windows) and "vmnet-natd" (Linux) when handling certain FTP requests. This can be exploited to cause a heap-based buffer overflow via specially crafted "eprt" and "port" FTP requests sent from the guest OS. Successful exploitation allows arbitrary code execution on the host OS, but requires that NAT networking is enabled on the virtual machine. The vulnerability has been reported in the following products: * VMware Workstation 5.5 and prior. * VMware GSX Server 3.2 and prior. * VMware ACE 1.0.1 and prior. * VMware Player 1.0 and prior. Solution: Update to the latest versions. http://www.vmware.com/download Alternatively, disable NAT networking on the virtual machine. http://www.vmware.com/support/kb/enduser/std_adp.php?p_faqid=2002 Provided and/or discovered by: Tim Shelton Changelog: 2005-12-27: Added link to US-CERT vulnerability note and added CVE reference. Original Advisory: VMware: http://www.vmware.com/support/kb/enduser/std_adp.php?p_faqid=2000 Tim Shelton: http://lists.grok.org.uk/pipermail/full-disclosure/2005-December/040442.html Other References: US-CERT VU#856689: http://www.kb.cert.org/vuls/id/856689

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